Re: SETI/ASTRO: MBrains/JBrains & Globular Clusters

From: Spike Jones (
Date: Mon Jul 16 2001 - 19:06:07 MDT

"Robert J. Bradbury" wrote:

> Mike Lorrey wrote:
> > Or old black holes. What is the Hawking estimates on the lifetime of
> > black holes in the range of .1-1.0 jupiters?
> I'm pretty sure any black holes that size evaporate over times
> much greater than the current age of the universe.

Yes and furthermore, in the current epoch, black holes are not
evaporating at all, they are growing because the density
of ordinary matter in the visible universe is sufficiently high.

> Scot Stride from JPL pointed out to me that the unresolved
> observations, interpreted as planetary mass objects, are
> making the transits at extremely high speeds. I agreed with
> him and suggested a couple of possible reasons:
> (a) Perhaps the objects are orbiting around the outside
> of the cluster itself (maybe Spike would comment on
> whether the velocity range 0.25 M_jupiter objects orbiting
> around 10^5 - 10^6 M_sun objects is faster or slower than typical
> planetary orbital velocities).

Hmmm, I dont think I understand the question. Scot Stride seems
to be saying that since the objects are making transits at extremely
high speed, this implies the cluster has higher mass than the visual
signature would indicate? The mass of the planetlike object wouldnt
matter for transition speed.

I need to study this more before I comment further. spike

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